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Synergistic Effect of Aminotrimethylene Phosphonic Acid (ATMP) – Al3+ System for Carbon Steel in Ground Water

Journal: International Journal of Mechanical and Production Engineering Research and Development (IJMPERD ) (Vol.10, No. 3)

Publication Date:

Authors : ; ;

Page : 5523-5534

Keywords : Carbon Steel; Corrosion Inhibition; Synergistic Effect; Cathodic Inhibitor; Aminotrimethylenephosphonic Acid;

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The inhibition efficiency (IE) of AminoTrimethylenephosphonic acid (ATMP) in controlling corrosion of steel immersed in ground water within the absence and presence of Al3+ has been evaluated by weight loss method. It is observed that the synergistic formulation consisting of 150ppm ATMP and 50 ppm of Al3+ has 98% IE. Effect of immersion period and pH on IE has also been studied. Polarization study reveals that ATMP- Al3+ system functions as a mixed inhibitor. AC impedance study reveals that a protective film is made on the metal surface. The protective film has been analyses by FT-IR and optical microscope(SEM) studies. It is found that the protective film consists of Fe 2+ -ATMP complex. On the basis of all the above studies, a suitable mechanism of corrosion inhibition is proposed.

Last modified: 2020-12-29 19:45:05